GtkRadiant Editor Manual

The most basic interaction with the editor is selecting and deselecting objects and components. Everything else builds off from these commands.
The shape of objects can be changed by selecting and editing their component parts. The editor has three component-selection modes: Face (F); Edge (E); Vertex (V). These can be toggled on and off by using their shortcut key or toolbar button.
Use ESC to exit a component-selection mode.

In the Camera or Orthographic Windows, this toggles selection of the object/component that is “closest” to the viewer and the mouse pointer.
Use SHIFT+ALT to replace the current selection instead of toggling

Regions are an important tool to learn and use early on. Whether you isolate off a single brush, or half a map, you’ll wonder how you ever got along without this tool in other editing programs. The selections on the Region Menu allow the mapper to isolate, and work on, a subset of the map. There are innumerable benefits to working in a “regioned” area of the map. However, the following are the most important:

It allows you to work with a few objects at a time, without the distraction of the rest of the map.

When you want to perform CSG operations, regioning lets you isolate the pieces from the rest of the map, reducing risk of making unwanted cuts or splits.

Map regions can be compiled without having to compile the rest of the map. This can be an incredible timesaver. Instead of spending hours to compile an entire map just to check for leaks in new construction, or check the appearance of a room, or test a lighting effect, minutes can be spent processing just the room itself.

There are several ways to select a region, by a group selection, by XY map window dimensions (or the corresponding view in YZ and XZ), or by a few selected objects.

The commands for selecting regioned areas are found under the View > Region Menu heading.

View > Region Menu

Off

(Menu: Region > Off)

This returns you back to the full map. Brushes that were selected while in the regioned mode remain selected until ESC is pressed to unselect them.

Set XY

(Menu: Region > Set XY)

Any map components that are inside, or that are touched by the bounds of the XY Map window are converted into a region. The size or shape of the window does not matter. Nor does the degree of Zoom matter. This is an excellent way to select are larger subset of your map, such as a complex room or group of rooms. Any brushes selected before regioning the map remain selected.

Set Brush

(Menu: Region > Set Brush)

This functions in a similar manner to the group selection command, Select Touching. Any map components contained within the XYZ bounds of the brush, or touching the XYZ bounds of the brush will be regioned off. The selecting brush itself is discarded.

Set Selected Brushes

(Menu: Region > Set Selected Brushes)

If you need to work with just a few brushes, this is the option to choose. Hi-light the brushes to be worked upon then select this option. Only those brushes are moved to the region. The selected brushes are unselected when the region is created.

Compiling Notes: Sometimes, when compiling a regioned area, md3 map object models near the edge of the region can cause a “false leak” situation to occur. This can usually be corrected by adjusting the region size to include more of the map near the md3 map object model.